Since the noise shows up when you use the brakes, it's likely to be brake pads. Now, since you hear it when you turn, it may be something rubbing on the tire either when it is turned, or when the weight shifts the body. It could also be sway bar bushings. Some stuff to try:
- See if the back brakes are quiet by slowing/stopping using only the hand brake
- See if the grind is detectable from the front when you gently put on the brakes while going very slow.
- See if the grind occurs when coasting (5 mph) straight, coasting/turning left or coasting/turning Rt.
- Park level with the wheel turned slightly right, reach behind the left frnt wheel and push/pull on the sway bar to see if it is loose.